Sellschaft



(No Model.)

' J. T.- HASSE & H. M. VAGHEROT.

RETORT AND MUFPLE FURNACE.

Patented July 9, 1889.

.AA if UNITED STAT S PATENT OFFICE.

JULIUS THEODOR I-IASSE AND I-IERRMANN MORlTZ VACHERQT, QF DRESDEN,

SAXONY, ASSIGNORS TO THE STETTINER OHAMOTTEFABRIK ACTIEN-GE- SELLSCHAFT, OF STETTIN, PRUSSIA, GERMANY.

RETORT AND MUFFLE FURNACE.

SPECIFICATION forming part of Letters Patent No. 406,732, dated July 9,1889.

Application filed October 10, 1885. Serial No. 179,499. (No model.) Patented in Germany May 26, 1883, No. 28,328 in England May 23, 1884, No. 8,144; in Belgium June 16, 1884, No. 65,284; in Sweden July 26, 1884, in Norway August 8,1884; in Denmark October 20, 1884, No. 944, and in Spain November 20, 1884, No. 6,428. i

To all whom it may concern.-

Be it known that we, J ULIUS THEODOR HAssE, a subject of the Emperor of Germany, and a resident of Dresden,SaXony, Germany,

and HERRMANN MORITZ VACHEROT, a subject of the King of Saxony, and a resident of said Dresden, have invented certain Improvements in Retort and Mufl'le Furnaces, (for which wehave obtained German patent, No. 29,323, dat- IO ed May 26, 1883; Danish patent, No. 944, dated October 20, 1884; Belgian patent, No. 65,234, dated June 16, 1884; British patent, No. 8,144, dated May 23, 1884; Spanish patent, No. 6,428, dated November 20, 1884; Swedish patent,

dated July 26,1884, and Norwegian patent, dated August 8, 1884,) of which the following is a specification.

Our invention consists of improvements in the construction of furnace, more particularly 2o retort or muflie furnaces; and the main object of our invention is to so construct the flues and other parts ofthe furnace as to obtain the most eifective combustion and efficient heating.

2 5 In the accompanying drawings We have illustrated our improvements as applied to a series of furnaces each containing aset of six retorts.

Figure 1 is a vertical section on the lines 0 H H and J J of Fig. 3. Fig. 2 is a sectional plan on the lines A A, B B, G O, D D, and E E of Fig. 1. Fig. 3 is a vertical section on the line G G of Fig. 1, and Fig. 4 is a vertical section on the line F F of Fig. 1.

5 Referring to Figs. 1, 2, and 3, a is the grate suppl ed with fuel through an opening I) in the front wall, which opening can be closed airtight by adoor 0, Figs. 2 and 3. Ashes, &c.,

are removed through an opening (1, which can also be closed air-tight by a door 6, Figs. 2

and Vhen these two doors are closed, af-

ter supplying fuel to the grate, no outside air can enter except through the series of airheating passages, which I will now describe.

5 Each furnace is provided with air-inlets j (see right-hand side of Fig. 2) at the front,

one on each side, and the amount of air admitted can be regulated by slides f. The air entering first passes through the lowermost circuitous channels or conduits h, thence up through the openings 2 into the circuitous conduits h above the intermediate smokeflues, hereinafter described. As shown at the sections 0 C, Fig. 3, and H 11, Fig. 1, these conduits h h communicate through openings i 4) with the fire-place immediately below the gratebars. (See also Fig. 3.) The conduits h h are also in communication with a series of air-heating channels 7?, Fig. 3, and section J J in Fig. 1, through the medium of passages 71- (See section 0 C, Fig. 2.) These channels 72. communicate with each other alternately at opposite ends, as shown by the arrows in Fig. 3, and the uppermost has outlet openings Z into the combustion-chamber just behind the bridgewall. A slide In, Fig. 3,0011- trols the amount of air admitted through the channels 7L3, and by this means the relative quantities of air admitted directly to the fire through the openings 11 below the grate-bars and to the combustion-chambers through the openings Z at the bridge-wall can be regulated at will, according to the demands of the furnace.

The products of combustion after exerting their effective heating action upon the retorts or muffies first pass down to the spaces on below the lowermost retorts, Figs. 1 and 4, and thence through the openings at at the rear, Figs. 1 and 4, and section 0 C, Fig. 2, into the smoke-fines 0, Figs. 1 and 4, and section D D, Fig. 2, which lie between the airheating conduits h and h. The products of combustion pass through the flues 0 from rear to front of the furnaces, and thence turn into the return-fines p, (D D, Fig. 2,) leading to the chimney at the rear.

In each ash-pit space below the grate-bars is a pan to contain a supply of Water, and the flues p in each furnace are extended below the pan in order to heat the water, so that the vapor rising from the pan may mingle with the already heated air entering the fire-place through the openings 1', to assist in sheetfective combustion of the gases.

It willbe observed that the smoke and air flues in the lower part of the furnace alternate with each other, and the streams of air and of the products of combustion flow in. opposite directions in their respective channels or flues, so as to get the most effective heating action of the products of combustion in their flues upon the air in theacljoining conduits or channels.

We claim as our invention- The fire-place having air-inlets i below the grate, and the combustion-chamber, also having an air-inlet l behind the bridge-wall, in 

